EvolutionEasyBloom L3
Question
A geneticist mixed together many different kinds of fruit flies — some with long wings, some with short wings, some with red eyes, some with brown eyes. After many generations, most of the flies had medium wings and red eyes, and most of the extreme types had disappeared. This experiment appears to demonstrate
Options
A.stabilizing selection.
B.geographic variation.
C.diversifying selection.
D.genetic drift.
Solution
Sol.(a) [Key Concept: Stabilizing Selection — Favours the Mean Phenotype] This experiment demonstrates stabilizing selection — selection that favours individuals about the mean (intermediate phenotype) and eliminates both extremes. The result is a reduction in variation and maintenance of the most common phenotype. Stabilizing selection favours individuals about the mean.
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